I’ve picked up the first two collections of that run, and I’ve liked them both. I know I don’t get half the background of what’s going on (references to which I’ve had to turn to the Internet for help), but I like the characterization he brings to, naturally enough, the women in the group.
If you like his writing, try picking up Whedon’s eight issue comic book series, Fray. I think you’ll enjoy it. And, hell, if you ever get a chance, take a gander at Buffy. Smart series.